Corn Starch (Maize)とは？用途・使用量・代替品・規格

Corn Starch Milk, also known as edible corn starch milk, is a milky liquid produced from corn through the wet-milling process, which removes corn germ, corn bran, and separates corn protein powder. It is a food-grade raw material used in the food industry, primarily for starch sugar and fermentation applications. Corn Starch Milk is an intermediate semi-finished product in the corn starch production process and serves as a crucial hub connecting upstream and downstream corn processing. It can either be directly supplied to downstream customers for further processing or be dehydrated and dried into edible corn starch powder. Compared to corn starch powder, corn starch milk eliminates the steps of drying, packaging, and re-dissolution, offering significant energy-saving and consumption-reduction advantages in the starch sugar and fermentation industries. Corn is one of the most important grain crops grown by humans, accounting for approximately one-quarter of the world's total grain production. China is a major corn-growing country, with total output second only to rice and wheat, ranking second in the world. Corn's high starch content in its kernels, wide planting regions, variety of by-products, year-round processing capability, and easy transportation and storage provide a solid raw material foundation for the corn starch milk industry. Corn Starch Milk appears as a white or light yellow milky liquid with a characteristic odor/taste and no visible foreign impurities. Corn starch, after certain processing, can be widely used in food, papermaking, textiles, pharmaceuticals, chemicals, and related industries, including beverages, confectionery, dairy, meat processing, condiments, nutritional snacks, functional health foods, enzyme preparations, various additives, brewing, as well as architectural coatings, mining, and petrochemicals, demonstrating extremely broad applications and promising market prospects. As an intermediate product, corn starch milk's downstream applications encompass starch sugar and sugar alcohols (the largest application area, increasing by 1.73 percentage points in 2025), papermaking (the second largest application area), food industry, modified starch, PLA (polylactic acid, an emerging growth highlight with a significant increase, accounting for a 0.82 percentage point rise), and pharmaceuticals/excipients.

Corn Starch Milk possesses not only the typical characteristics of starch as a polysaccharide carbohydrate—gelatinization (particles absorbing water and swelling into a viscous colloid upon heating), hydrolysis, and viscosity properties—but also the unique advantages of a liquid intermediate. In food processing, it can serve as a thickener, stabilizer, emulsifier, gelling agent, and filler. The main physicochemical characteristics of Corn Starch Milk include:

Stability: Maintains a stable suspension without layering or sedimentation under suitable temperature and pH conditions. The pH value generally ranges from 5.0 to 9.5. For a 50 g/L starch milk, the pH value is required to be between 5.0 and 9.5.